bluetoothScanEventStream method

Provides an event stream for Bluetooth device scanning updates.

Returns an EventChannel that broadcasts Bluetooth scanning events including device discoveries, scan status changes, and error conditions.

Returns:

• EventChannel: Stream of Bluetooth scanning events

Usage:

final bluetoothStream = communicator.bluetoothScanEventStream();
bluetoothStream.receiveBroadcastStream().listen((event) {
  if (event == "SCANNING_STARTED") {
    print('Bluetooth scan started');
    // Update UI to show scanning indicator
  } else if (event == "SCANNING_STOPPED") {
    print('Bluetooth scan stopped');
  } else if (event == "DEVICE_NOT_SUPPORTED") {
    print('Device does not support Bluetooth LE');
  } else if (event == "PERMISSION_NOT_GRANTED") {
    print('Bluetooth permissions not granted');
  } else {
    // Parse device discovery event
    try {
      final device = CustomBluetoothDevice.fromJson(jsonDecode(event));
      print('Found device: ${device.name}');
    } catch (e) {
      print('Failed to parse device data: $e');
    }
  }
});

Event Types:

• "SCANNING_STARTED": Bluetooth scan has begun
• "SCANNING_STOPPED": Bluetooth scan has ended
• "REQUEST_USER_TO_SWITCH_ON_BLUETOOTH": Bluetooth is disabled
• "PERMISSION_NOT_GRANTED": Missing Bluetooth permissions
• "DEVICE_NOT_SUPPORTED": Device doesn't support Bluetooth LE
• JSON device data: When a device is discovered

Important Notes:

• Requires Bluetooth permissions
• Device must support Bluetooth LE
• Events continue until scanning is stopped